I'm getting them like crazy, I usually need three or four refreshes just to edit a post. Here's my most recent one, but I'm sure I'll get another one here shortly.
Still getting them. Has the look of server weirdness. I suppose it could be some DOS targeted at the server software rather than just a brute force DDoS.
Seems to happen more often with things like clicking ratings, watching/unwatching threads, or using the editor than opening threads or posting.